Kate's agency in Act I is real but self-destructive — she CHOOSES the museum stranger, CHOOSES to get in the taxi, CHOOSES the affair. Her control drops as the consequences mount, but her agency is high right up to the elevator where it is cut to zero. After the protagonist swap, Liz's agency starts reactive but builds steadily: she forms an alliance with Peter, breaks into Elliott's office, runs the seduction sting. Her agency climbs even when control dips because she is making choices about how to investigate, how to fight back. The reveal inverts everything — the audience's entire model was wrong, but Liz's agency was real all along.